CD

名词 cd:

1. a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores
   同义词：cadmium, atomic number 48
2. the basic unit of luminous intensity adopted under the Systeme International d'Unites; equal to 1/60 of the luminous intensity per square centimeter of a black body radiating at the temperature of 2,046 degrees Kelvin
   同义词：candle, candela, standard candle
3. a debt instrument issued by a bank; usually pays interest
   同义词：certificate of deposit
4. a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser
   同义词：compact disk, compact disc

形容词 cd:

1. being one hundred more than three hundred
   同义词：four hundred, 400

1. The lines AB and CD intersect at E.
   直线AB与直线CD相交於E点。
2. The line AB intersects the line CD at E.
   直线AB与直线CD相交於E点。
3. AB and CD intersect at (the point) P.
   AB线和CD线在P点相交。